We have over 15 years of experience building, maintaining and repairing custom decorative ponds, koi ponds, waterfalls, fountains and pondless recirculating waterfalls. We take a great deal of care in our work and value our reputation. Taking the extra time to really help our clients and giving them professional quality workmanship are our highest priority. Give us a call, we're happy to answer your questions.
We do this type of work because we really enjoy it. Specializing in custom water features is fun, creative and rewarding work. It's definitely not easy work, but it's tons of fun!
Overview
Hired 22 times
Background checked
License verified
21 years in business
Business hours
SunClosedMon8:00 am - 7:00 pm
Payment methods
This pro accepts payments via Cash, Check, and Venmo.
Services offered
Softscaping
Work needed
Smaller landscape changes
Larger landscape changes
Complete renovation
Hardscaping
Water features
Projects and media
Projects and media
Reviews
Customers rated this pro highly for work quality, professionalism, and responsiveness.
Excellent 4.9
17 reviews
5
88%
4
12%
3
0%
2
0%
1
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Your trust means everything to us. Learn about our review guidelines.
Kimberly W.
Jun 1, 2026
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Hired on Thumbtack
Replied back in a timely manner. Showed upto my residence on time. Walked me through every step and kept me informed. Job done professionally and at a fair price. I would most definitely recommend & use again.
Details: Outdoors • Pond • Stream • Water feature has a leak • Stones or other structural components need to be replaced • Owner
Water Feature Repair and Maintenance
Nina E.
Apr 22, 2026
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Hired on Thumbtack
Sean of Cornerstone communicated well, showed up on time and had everything he needed. He got everything done perfectly.
Details: Outdoors • Fountain • Pump is broken • Spring maintenance - clean-out as weather gets warmer • Owner
Water Feature Repair and Maintenance
Vansen W.
Feb 9, 2021
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Hired on Thumbtack
Shawn was very good in email regarding his availability. When he arrived I was so impressed. His expertise with fountains was obvious, and his work impeccable. Our basalt columns were leveled precisely and water flows freely down all sides. Very good cleanup. Very reasonable rates!
Details: Outdoors
Water Feature Repair and Maintenance
Cindy W.
Jun 5, 2022
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Hired on Thumbtack
Shawn is a gem. He was professional, honest, knowledgeable, informative, and went above and beyond. He resolved my issue and advised me on things I had no idea about. I feel so lucky and fortunate to have met him. He will be my pond/waterfall guy forever!
Details: Outdoors • Pond • Waterfall
Water Feature Repair and Maintenance
Alan R.
Apr 11, 2023
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Hired on Thumbtack
Cornerstone does excellent work. Very professional and friendly. Replaced my waterfall pump, cleaned tubing, and showed me how to maintain it. I recommend Cornerstone highly.
Details: Outdoors • Fountain • Pump is broken
Water Feature Repair and Maintenance
Credentials
License
License type: C27 - Landscaping Contractor
License state: CA
License verified on 10/13/2025
Background Check
Christopher Sexton
FAQs
What should the customer know about your pricing (e.g., discounts, fees)?
I generally can't accurately quote pricing on construction projects without going out to the site and looking at the area. Rough estimates over the phone are free. We do have a minimum charge for driving out to do a consultation, leak detection or for general cleaning or repair work. Sending us photos and asking questions is free!
What is your typical process for working with a new customer?
Usually we get a phone call or an email from a prospective client and I then set up an appointment to meet at the residence to look at the site and go over a plan. For new construction I will typically come out and measure the area, do sketches and try to guide my clients through some different options available and discuss some various design possibilities. We brainstorm, we look through pictures of previous projects we've done and sometimes we do a little searching online for visual aids to help illustrate an idea, concept or style. In general when I go out to a home or business to do an estimate I try to help them bring their creative visions and ideas to life on paper. My goal is to establish a clear picture of what is expected so that both the client and I are on the same page throughout the duration of the project.
What education and/or training do you have that relates to your work?
I have over 20 years of construction experience. Some of my education is from college and some is from going to vocational type training to prepare for my state licensing exam. Most of it is from direct on the job project experience. I currently hold a California state contractor's license classification for landscape construction C-27. This allows us to do a wide range of construction projects outside of the house, but restricts us from contracting any work within the house. I have been doing water feature repair and maintenance work for several years. I offer solutions for wide variety of maintenance and repair issues.
